>>283555329
This is one of those lines that slowly tries to deceive you into accepting the image that the author wants to you to believe instead of constructing it in the story.
Sandro wants you to think that the Worm is evil so everything related to it is evil. Kengan is good so everything about it is good. So the Worm wanting to be a part of Kengan is PURE evil, and Kengan will cease being good.